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Predictions for low-metallicity s-process Lead stars showing peculiar r-process enhancements
Published online by Cambridge University Press: 23 December 2005
Abstract
Spectroscopic abundances of s- and r-process enriched very metal-poor stars are interpreted as the result of mass transfer in a binary system from an AGB companion assuming an initial composition of the parental cloud pre-enriched in r elements. The spectroscopic determination of [Na/Fe], [Mg/Fe] and [ls/Fe] permits an estimate of the initial AGB stellar mass, while a value [Zr/Nb] ≈ 0 is a nuclear indicator of an extrinsic AGB in a binary system.
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- © 2005 International Astronomical Union
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